问题
解答题
计算:(1)25×
(2)(-2)2+[18-(-3)×2]÷4. |
答案
(1)25×
-25×(-3 4
)1 4
=25×[
-(-3 4
)]1 4
=25×1
=25;
(2)(-2)2+[18-(-3)×2]÷4
=4+(18+6)×1 4
=4+24×1 4
=4+6
=10.
计算:(1)25×
(2)(-2)2+[18-(-3)×2]÷4. |
(1)25×
-25×(-3 4
)1 4
=25×[
-(-3 4
)]1 4
=25×1
=25;
(2)(-2)2+[18-(-3)×2]÷4
=4+(18+6)×1 4
=4+24×1 4
=4+6
=10.